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lvremove: easier removal of dependent lvs

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Add function to remove lvs which are depending on removed lv
prior the lv is removed.

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This commit is contained in:
Zdenek Kabelac 2013-02-20 16:13:17 +01:00
parent 3679bb1cd9
commit d023b2d12f
2 changed files with 33 additions and 17 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.99 -
===================================
Add _lv_remove_segs_using_this_lv() for removal of dependent lvs.
Improve activation code for better support of stacked devices.
Add _add_layer_target_to_dtree() for adding linear layer into dtree.
Extend _cached_info() to accept layer string.

47
lib/metadata/lv_manip.c
View File

@ -3488,6 +3488,35 @@ int lv_remove_single(struct cmd_context *cmd, struct logical_volume *lv,
return 1;
}
static int _lv_remove_segs_using_this_lv(struct cmd_context *cmd, struct logical_volume *lv,
const force_t force, unsigned level,
const char *lv_type)
{
struct seg_list *sl;
if ((force == PROMPT) &&
yes_no_prompt("Removing %s \"%s\" will remove %u dependent volume(s). "
"Proceed? [y/n]: ", lv_type, lv->name,
dm_list_size(&lv->segs_using_this_lv)) == 'n') {
log_error("Logical volume \"%s\" not removed.", lv->name);
return 0;
}
/*
* Not using _safe iterator here - since we may delete whole subtree
* (similar as process_each_lv_in_vg())
* the code is roughly equivalent to this:
*
* while (!dm_list_empty(&lv->segs_using_this_lv))
* dm_list_iterate_items(sl, &lv->segs_using_this_lv)
* break;
*/
dm_list_iterate_items(sl, &lv->segs_using_this_lv)
if (!lv_remove_with_dependencies(cmd, sl->seg->lv,
force, level + 1))
return_0;
return 1;
}
/*
* remove LVs with its dependencies - LV leaf nodes should be removed first
*/
@ -3496,7 +3525,6 @@ int lv_remove_with_dependencies(struct cmd_context *cmd, struct logical_volume *
{
percent_t snap_percent;
struct dm_list *snh, *snht;
struct seg_list *sl, *tsl;
struct lvinfo info;
if (lv_is_cow(lv)) {
@ -3547,22 +3575,9 @@ int lv_remove_with_dependencies(struct cmd_context *cmd, struct logical_volume *
return_0;
}
if (lv_is_used_thin_pool(lv)) {
/* Remove thin LVs first */
if ((force == PROMPT) &&
yes_no_prompt("Removing pool %s will also remove %u "
"thin volume(s). OK? [y/n]: ", lv->name,
/* Note: Snaphosts not included */
dm_list_size(&lv->segs_using_this_lv)) == 'n') {
log_error("Logical volume %s not removed.", lv->name);
return 0;
}
dm_list_iterate_items_safe(sl, tsl, &lv->segs_using_this_lv)
if (!lv_remove_with_dependencies(cmd, sl->seg->lv,
force, level + 1))
if (lv_is_used_thin_pool(lv) &&
!_lv_remove_segs_using_this_lv(cmd, lv, force, level, "pool"))
return_0;
}
return lv_remove_single(cmd, lv, force);
}